Liebert DS user manual 53kW 15ton / 70 & 77kW 20 & 22ton

Piping Schematics

Figure 69 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton), semi-hermetic compressor models

Note: Drawing not to scale									All dimensions
	Tolerance on all								from rear corner
	piping dimensions								of unit including
					A			A	panels
	is ± 1/2" (13mm)					Front View
									X
						Section A-A
									O
						Blower	16-1/16"	Blower	Y
				R		Outlet	(408 mm)	Outlet
4" (102mm)								B1	35"
	L1	L2	G1	G2
							B2		(889mm)
	16-7/16"					ECS
	(418mm)

		HUM	ECR			LV1
			CD			LV2
						LV3
		E1 E2	Front of Unit
				109"
			(2769mm)			DPN000928
						Rev. 2
			X		Y	Connection Size / Opening
Point		Description	inches (mm)		inches (mm)	inches (mm)
R	Refrigerant Access		82-3/4 (2102)		13-7/8 (352)	16-7/16 x 4 (418 x 102)
					53kW (15ton) / 70 & 77kW (20 & 22ton)
L1	Liquid Line System 1		97 (2464)		16-7/8 (428)	1/2 / 5/8 Cu Sweat
L2	Liquid Line System 2		93-5/16 (2370)		16-7/8 (428)	1/2 / 5/8 Cu Sweat
G1	Hot Gas Discharge 1		90-5/8 (2302)		16-5/8 (422)	7/8 / 1-1/8 Cu Sweat
G2	Hot Gas Discharge 2		88 (2235)		16-5/8 (422)	7/8 / 1-1/8 Cu Sweat
CD	Condensate Drain *		69-1/4 (1759)		30 (762)	3/4 FPT
	W/ Optional Pump		69-1/4 (1759)		30 (762)	1/2 Cu Sweat
HUM	Humidifier Supply Line		76-1/2 (1943)		29 (736)	1/4 Cu Sweat
ECS**	Econ-O-Coil Supply		78-5/8 (1997)		22-1/4 (565)	2-1/8 Cu Sweat
ECR**	Econ-O-Coil Return		72 (1829)		29 (737)	2-1/8 Cu Sweat
HS	Hot Water Reheat Supply				Consult Factory
HR	Hot Water Reheat Return				Consult Factory
E1	Electrical Connection (High Volt)		78-1/2 (1994)		31-1/8 (790)	2-1/2
E2	Electrical Connection (High Volt)		75-3/8 (1915)		31-1/8 (790)	2-1/2
LV1	Electrical Connection (Low Volt)		1-7/8 (48)		28-1/2 (724)	7/8
LV2	Electrical Connection (Low Volt)		1-7/8 (48)		30-1/4 (768)	7/8
LV3	Electrical Connection (Low Volt)		1-7/8 (48)		32 (813)	7/8
B1	Blower Outlet (15 x 15)		23-1/8 (587)		18-1/16 (459)	18-3/4 x 16-1/16 (476 x 408)
	Blower Outlet (15 x 11)		27-3/4 (705)		18-1/16 (459)	14-3/4 x 16-1/16 (375 x 408)
B2	Blower Outlet (15 x 15)		50-3/8 (1280)		18-1/16 (459)	18-3/4 x 16-1/16 (476 x 408)
	Blower Outlet (15 x 11)		54-3/8 (1381)		18-1/16 (459)	14-3/4 x 16-1/16 (375 x 408)

*Field-pitch condensate drain line a minimum of 1/8" (3.2mm) per foot (305mm). All units contain a factory-installed condensate trap. Do not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all local codes.

**Supplied on Dual-Cool systems only (4-pipe system)

94